<template>
  <div class="login-container">
    <div class="login-weaper  animated bounceInDown">
      <div class="login-logo">
        <img src="/img/logo.png" alt="">
      </div>
      <p class="login-tip">{{ website.title}}</p>
      <div class="login-border">
        <div class="login-main">
          <h4 class="login-title">
            <el-select v-model="active"
                       class="login-select animated fadeIn"
                       placeholder="点击请选择租户"
                       @change="handleCommand">
              <el-option v-for="tenant in tenantList"
                         :key="tenant.id"
                         :label="tenant.name"
                         :value="tenant.id"></el-option>
            </el-select>
          </h4>
          <userLogin :active="active" v-if="activeName==='user'" />
          <codeLogin :active="active" v-else-if="activeName==='code'" />
          <thirdLogin :active="active" v-else-if="activeName==='third'" />
          <forgetpwd :active="active" :activeName.sync="activeName" v-else-if="activeName==='forget'" />
          <div class="login-menu">
            <a href="#" @click.stop="activeName='user'">账号密码</a>
            <a href="#" @click.stop="activeName='code'">手机号登录</a>
            <a href="#" @click.stop="activeName='third'">第三方登录</a>
            <a href="#" @click.stop="activeName='forget'">忘记密码</a>
          </div>
        </div>

      </div>
    </div>
    <div class="login-copyright">
      {{ website.copyright}}
    </div>
    <top-color v-show="false" />
  </div>
</template>
<script>
import {fetchList} from '@/api/admin/tenant'
import userLogin from './userlogin'
import codeLogin from './codelogin'
import thirdLogin from './thirdlogin'
import forgetpwd from './forgetpassword'
import { mapGetters } from 'vuex'
import { getStore, setStore } from '@/util/store'
import topColor from '@/page/index/top/top-color'

export default {
  name: 'Login',
  components: {
    userLogin,
    codeLogin,
    thirdLogin,
    forgetpwd,
    topColor
  },
  data () {
    return {
      tenantList: [],
      active: '',
      activeName: 'user',
      socialForm: {}
    }
  },
  watch: {
    $route: {
      handler () {
        const params = this.$route.query
        if (this.validatenull(params.state) && this.validatenull(params.code)) return

        this.socialForm.state = params.state
        this.socialForm.code = params.code

        const loading = this.$loading({
          lock: true,
          text: `登录中,请稍后。。。`,
          spinner: 'el-icon-loading'
        })
        this.$store.dispatch('LoginBySocial', this.socialForm).then(
          () => {
            loading.close()
            this.$router.push({ path: this.tagWel.value })
          }).catch(() => {
            loading.close()
          })
      },
      immediate: true
    }
  },
  created () {
    this.watermark()
    this.getTenantList()
  },
  mounted () {
  },
  computed: {
    ...mapGetters(['website', 'tagWel'])
  },
  methods: {
    handleCommand (command) {
      setStore({ name: 'tenantId', content: command })
    },
    getTenantList () {
      fetchList().then(response => {
        this.tenantList = response.data.data
        this.active = getStore({ name: 'tenantId' }) ? getStore({ name: 'tenantId' }) : this.tenantList[0].id
        if (!getStore({ name: 'tenantId' })){
          setStore({ name: 'tenantId', content: this.tenantList[0].id })
        }
      })
    },
    watermark () {
      const text = ''
      const canvas = document.createElement('canvas')
      canvas.width = '500'
      canvas.height = '200'
      const ctx = canvas.getContext('2d')
      ctx.clearRect(0, 0, 200, 200) // 绘制之前画布清除
      ctx.font = '30px 黑体'
      ctx.rotate(-20 * Math.PI / 180) // 为了实现水印倾斜效果,旋转画布坐标系
      ctx.fillStyle = 'rgba(100,100,100,0.15)' // 画笔颜色
      ctx.fillText(text, -20, 200) // 书写的内容及位置
      ctx.rotate('20*Math.PI/180') // 坐标系还原,如果后续没有其他操作,这一步可以省略
      // 将canvas的内容转换为base64编码
      const data = canvas.toDataURL('image/png', 1) // 1表示质量(无损压缩)

      window.onload = () => {
        const background = 'url(' + data + ') repeat'
        var watermark = document.createElement('div')
        watermark.style.width = '100%'
        watermark.style.height = '100%'
        watermark.style.position = 'fixed'
        watermark.style.left = '0'
        watermark.style.top = '0'
        watermark.style.pointerEvents = 'none'
        watermark.style.background = background
        watermark.style.zIndex = '9999'
        document.body.append(watermark)
      }
    }
  }
}
</script>

<style lang="scss">
  @import "@/styles/login.scss";
</style>
